import logging

from fastapi import FastAPI, HTTPException, Request
from fastapi.exceptions import RequestValidationError
from fastapi.responses import JSONResponse


logger = logging.getLogger(__name__)


def register_error_handlers(app: FastAPI) -> None:
    @app.exception_handler(HTTPException)
    async def http_exception_handler(_: Request, exc: HTTPException) -> JSONResponse:
        return JSONResponse(
            status_code=exc.status_code,
            content={"error": {"message": exc.detail, "type": "http_error"}},
        )

    @app.exception_handler(RequestValidationError)
    async def validation_exception_handler(_: Request, exc: RequestValidationError) -> JSONResponse:
        return JSONResponse(
            status_code=422,
            content={
                "error": {
                    "message": "Request validation failed",
                    "type": "validation_error",
                    "details": exc.errors(),
                }
            },
        )

    @app.exception_handler(Exception)
    async def unhandled_exception_handler(_: Request, exc: Exception) -> JSONResponse:
        logger.exception("Unhandled web API error")
        return JSONResponse(
            status_code=500,
            content={"error": {"message": str(exc), "type": "internal_error"}},
        )